[Asterisk-Users] Help compiling bristuff on FC3

[Scanna]

I have a problem compiling bristuff modules on Fedora Core 3. Compiling 
zaphfc, qozap and cwain I get thin warning:

*** Warning: "zt_register" [/usr/local/src/bristuff/qozap/qozap.ko] 
undefined!
*** Warning: "zt_receive" [/usr/local/src/bristuff/qozap/qozap.ko] 
undefined!
*** Warning: "zt_transmit" [/usr/local/src/bristuff/qozap/qozap.ko] 
undefined!
*** Warning: "zt_ec_chunk" [/usr/local/src/bristuff/qozap/qozap.ko] 
undefined!
*** Warning: "zt_unregister" [/usr/local/src/bristuff/qozap/qozap.ko] 
undefined!

Despite this everything seems to work, but I would want to understand what 
is the cause. I have tried with all the recent versions of bristuff always 
getting the same result. Does someone can help me?

Thanks